Object-inclosing casing



April 3o, 1929.

W. SCHMID OBJECT INCLOSING GASING Filed April 5. 1926 :711/14 1111 'Ilc.: r,

Patented Apr. 30, 1929.

WILLIAM SCHMII), OF COLDWATER, MICHIGAN, ASSIGNOR T CASKEYJDUPBE 'MurUFACTURING COMPANY, OF COIDWATER, MICHIGAN, .A CORPQRTION OFOHIO.

OBJ ECTJN CLOSING CASING.

Application led April 5,

My invention relates to objects inclosing n casings having closures andresides in the Lil) provision ot improved intere-ngaging torniationsupon the body of such a casing and the closure therefor whereby theclosure may be surrounded by the casing body.

In accordance with my invention, the cle sure is provided with tonguesprojecting trom the edge thereof into recesses formed in the casing bodyand the casing body, in turn, is formed with tongues that project intorecesses formed in the closure. Each tongue upon the closure alsoconstitutes a Wall of one of the recesses, the tongues and recesses uponthe closure being distributed in couples around the closure. The tonguesand recesses upon the body of the casing similarly inter-related. Theinterengaging "formations upon the casing bodyY and casing closure arethus provided in compact arrangement without weakening the structure.

The casing ot my invention is ot' j )articular ser 7ice in theconstruction oit switches having movable switching pai-ts Within thecasing and terminal contacts passing through the casing closure whe-rethey are connected with the circuit Wires. The recesses in the casingclosure receive the tongues upon the casing body at a depth which WillWidely space tongues upon the casing body trom the circuit ivires uponthe outer tace of the closure whereby the casing body, which iscustomarilv nietldlic7 `is removed trom the short circuiting relationwith the terminal contacts upon the casing closure.

"lfhe accompanying drawing illustrates the pretcrrcnl embodiment ot theinvention as employed. with a switch structure. Fig. 1 being a rearvieuv ot a switch having a easine: ot rnv invention; Fig. 2 a sectionalplan view online QW@ oit Fig. 1 Fig. 3 is a plan fieiv ot part ot thecasing; and Fig. l illustrates a portion ot the casing body and cas ingclosure in perspective and in separated relation.

rllhe structure illustrated includes a metallic cylindrical casing body1 having a Wall 2 at one end thereof. rIbis casing body is suitablyassembled at its said end Wall With a mounting plate 3. The said endWall is nvv'ardly dished to provide.` with the mount-- ing plate, anannularl recess il. The hub por tion 5 ot a switch handle 6 is JformedWith flanges 7 that are received in the recess el, the inner end of thehub projecting through 192e. j serial Nofsasaa.

a circular holeS in the mounting plate, this hole being coaxial with`the ycasing body. This construction and arrangement of the handlepermits iteto be turned'upon;` the axis of the casing body.l A ring9 ofinsulation is also coaxial with the casing body, the handle being placedin turning engagement with thisring by'means of `the tonguesy 10 thatare received Within grooves 11 formed upon the inner side of the ring.This ring is formed with cylindrical recesses 12 in` which thecylindrical spring barrels 13 are slidably received. These springbarrels house coiled springs 14 and inclose the headed ends ot theplungers 15 that project through the spring barrels into engagement withthe end Walls of the recesses 12.v The springs 14 press upon theplunger-s andjiilso upon the spring barrels and therefore tend to pressthese parts in opposite diretions. The spring barrels are mounted upon a.float-y ing contact carrier 1G, here shown as a metallic ring. The endsof the spring barrels opposite the ends through which the pluug# ersproject constitute contacts which are engageable with the contacts 17which are in the nat-ure of flanges at the inner ends of metallicbushings 18. These metallic bushings are also provded with flanges 19 attheir rear ends. The metallic contact bushings 18 are carried by andpassed through a closure in the form of a circular plate 2O formed ot'inj sulating material. The bushings are threaded to receive bindingscrews 21. that cl amp the circuit Wires Q2 into firm mechanical andelectrical engagement with the bushings.

The closure 20 is surrounded by the casbody and has tongues in the planethereof that project beyond the closure 20- into recesses 2l formed inthe casing body. The casing body is formed With tongues Q5 that areinwardly bent at angles to the cylindrical wall ot' the casing body tobe received Within recesses 26 formed in the closure. The tongues 23areot' the full thickness ot the ciri cular closure 20, While therecesses 26 are of a depth less than the thickness ot the closure toatl'ord slots for the angular tongues 25. The angular tongues 25 uponthe casing body rmly hold the closure tongues 23 in the bottoms ot therecesses 24 whereby the contacts 17 are held in a fixed plane to enablethe con tacts upon the carrier 16 to be properly brought into and out ofengagement therewith. The recesses 26 in the closure define positionsfor the inturned tongues 25 which will Widely separate these tonguesfrom the bushing flanges 19 and the wires clamped against these flangesby the screws 2l Whereby the tongues 25 are )revented from liuving shortcircuiting relation with the contacts upon the closure. The tongues 23constitute Walls of the recesses 26, each tongue 23 thus having a recess26 immediately contiguous thereto, the recesses 24 and tongues 25 in thecasing body being similarly related.

Having thus described my invention, I claim:

A easing struct-ure `coniprising n cylindrical casing body and a closurein the forni of u circular plate surrounded by the easing body, saidcasing body and closure being euch formed with immediately contiguoustongues und recesses, the tongues upon the closure being in the plane ofthe closure end substantially of the thickness of the closure, therecesses in the closure being less in depth than the thickness of theclosure to afford seats for the tongues upon the casing body, thesetongues being inwardly bent into the recesses in the closure andengaging the aforesaid slots to hold the closure against outward movenient with respect to the easing the tongues upon the closure projectinginto the recesses in the casing body and acting iinlependontly of thetongues on said easing to hold the closure against turning movementwithin the easing.

In witness whereof, I hereunto subscribe my name.

IVILLIAM SCHMII).

